Use of the PARC code to estimate the off-design transonic performance of an over/under turboramjet nozzle
Use of the PARC code to estimate the off-design transonic performance of an over/under turboramjet nozzle
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DOI：
10.2514/6.1995-2616
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发表时间：
1995-07
期刊：
影响因子：
--
通讯作者：
David W. Lam
中科院分区：
文献类型：
--
作者：
David W. Lam
采用PARC计算流体力学（CFD）程序，对双喉道单膨胀斜面喷管（SERN）的跨音速性能进行了研究。喷管构型来自一架由四台吸气式涡轮冲压发动机提供动力的马赫数为5的概念巡航飞机。最初的试验用例使用欧拉模式的二维PARC来研究几何变化对跨音速性能的影响。其他情况下使用粘性模式的二维版本和欧拉和粘性模式的三维版本。分析结果表明，在跨音速条件下，喷管性能较低，喷管流场为高度三维。在另一项使用PARC代码的比较研究中，使用了一种单喉道SERN构型，该构型在跨音速条件下的实验数据是可用的，以验证上/下涡轮冲压发动机喷管的结果。
The transonic performance of a dual-throat, single-expansion-ramp nozzle (SERN) was investigated with a PARC computational fluid dynamics (CFD) code, an external flow Navier-Stokes solver. The nozzle configuration was from a conceptual Mach 5 cruise aircraft powered by four air-breathing turboramjets. Initial test cases used the two-dimensional version of PARC in Euler mode to investigate the effect of geometric variation on transonic performance. Additional cases used the two-dimensional version in viscous mode and the three-dimensional version in both Euler and viscous modes. Results of the analysis indicate low nozzle performance and a highly three-dimensional nozzle flow at transonic conditions. In another comparative study using the PARC code, a single-throat SERN configuration for which experimental data were available at transonic conditions was used to validate the results of the over/under turboramjet nozzle.